code = RIS_2G6CodeBook( 90 , 90 , 90 ,135);
% function [dcdcbook]  = RIS_2G6CodeBook( phi_in , theta_in ,phi_out ,theta_out)
% %RIS置于xz平面，信号与z轴夹角为俯仰角phi，信号在xy平面的投影与x轴的夹角为方位角theta
